Wrench



(No Model.) l

J. A.ZANDBR. WRENCH.

No. 473,043. PatentedApr. 19, 1892.

UNITED STATES PATENT OFFICE.

JOHAN ALBERT ZANDER, OF SAN FRANCISCO, CALIFORNIA.

WRENCH.

sPEcIFIcATIo'N forming part ef Lettere Patent No. 473,048, dated April19, 1892.

Application filed November 9, T891. Serial No. 411,/356. (No model.)

To a/ZZ whom t may concern:

Be it known that I, JOHAN ALBERT ZANDER, a citizen of the Kingdom ofSweden, residing at San Francisco, in the county of San Francisco andState of California, have .invented certain new and useful Improvementsin Wrenches; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in wrenches; and it consists inthe construction and arrangement of parts more fully hereinafterdescribed, and definitely pointed ont in the claims.

The object of my invention is to construct a wrench in an improved form,whereby the nut or bolt is tightly grasped by the jaws after the samehas been adjusted in contact with the nut, or more particularly toconstruct an improved wrench, commonly known as the pivoted-handlewrench. I attain these objects by the construction illustrated in theaccompanying drawings, wherein like letters of reference indicatecorresponding parts in both the views, and in which- Figure l is a sideelevation, and Fig. 2 is an edge elevation.

In the drawings, A represents a handle having a bifurcated end B, whichis constructed with straight horizontal upper edge l), and which head isenlarged or flaredout and formed with sloping shoulders b. Centrally inthe bifurcated end of the handle is pivotally secured by a suitable boltc the shank-arm C of the stationary jaw'C, so that the shank may beswung backward and forward upon the handle.

The shank C has a reduced lower portion, forming at its upper end theshoulder c', and has slidingly secured thereon the movable jaw D, formedwith a lowerring d and a connecting-post el', through which and into thejawD is placed an actuating-screw E, (shown in dotted lines) the lowerend of the screw E carrying a milled nut F, with which the same isturned.

Surrounding the lower end of the shank is a collar G, having a flathorizontal under edge resting directly on the flat upper edge of thehandle. This collar is providedwith an upper extension g, havingasloping inner face and a recessed extension g', into which the lower endof the screw is pivotally secured in any suitable manner. By forming thecollar G with the upward extension I produce a recess H between the sameand the lower collar of the movable jaw. In this recess, on oppositesides, are secured suitable C-springs I, ad j ustably attached to theshank bygset-screws J, thet-ails of the C-spring being so curved that aportion thereof rests on the inclinededge of the extension g, and byturning the springs toward the front of the wrench the pressure on thecollar G may be increased. This spring is located directly over thepivotal connection of the shank with the handle and normally tends tohold the collar G in engagement with the horizontal edge of the handle,thereby forcing the handle to retain a normal position straight with theshank of the stationary jaw.

, When the movable jaw is forcedy up into engagement with the nut andpressure is brought to bear on the handle, the shoulders b tend toclosely fix the lower jaw in contact with the nut. As soon as the handleis released the spring will force the same back to its normal position.By constructing the collar G with the projection g I secure additionalstrength for the collar when the handle is forced toward the right.

I am aware that many minor changes in the construction and arrangementof the parts of my device can be made and substituted for those hereinshown and described without in the least departing from the nature andprinciple of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a wrench, the combination, with the handle and the shank pivotedthereon, of a movable jaw, a collar surrounding the shank, a screwpivoted in the collarV for actuating the jaw, and an adjustable C-springon the outer face of the shank engaging the upper edge of the collar,substantially as described.

2. In a wrench, the combination, with the handle having a bifurcated endwith a straight horizontal upper edge, of a shank pivoted in IOO Yhandleinto close Contact, substantially as described. v Y

In testimony whereof I aflix my signature in presence of two Witnesses.

J. ALBERT ZANDER.

Witnesses:

ALFRED A. ENQUIST, JOHN E. SUNDSTROM.

